“Couldn’t Percy do that?” Harry asked. The last he had heard, the third Weasley brother was working in the Department of International Magical Cooperation at the Ministry of Magic. At these words all the Weasleys and Hermione exchanged darkly significant looks. “Whatever you do, don’t mention Percy in front of Mum and Dad,” Ron told Harry in a tense voice. “Why not?” “Because every time Percy’s name’s mentioned, Dad breaks whatever he’s holding and Mum starts crying,” Fred said. “It’s been awful,” said Ginny sadly. “I think we’re well shut of him,” said George with an uncharacteristically ugly look on his face.

In case you've not picked up on the ongoing debate below, please be aware that the answer you've accepted is (1) not substantiated by convincing appropriate examples of the exact usage (2) deemed incorrect by the only authority I can find who covers this usage (3) wrong in my opinion. You were very close with 'better': It's (far) better to not have him around. No intensification attaches to 'rid'; 'very rid' is not the true explanation.
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Edwin AshworthAug 18 '14 at 9:19

Oh, are we allowed to slant people toward our answers by using comments? OP, please note that (1) the above comment is being made by a user who claims to have used well the same way for over fifty years, and hence may be outdated and that (2) the answer he has posted is sourced from a text over forty years old, by an author who did not speak the language as it is spoken today (he passed away in the 90s) and (3), may be partially correct - I can consider others' views, and recognise that language my realise multiple meanings simultaneously. Please, if you feel it presents a more convincing...
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jimsugAug 18 '14 at 10:57

argument, change your answer acceptance. It's possible for both answers to be correct in this case, but if the little tick is valuable to others, I'll happily concede it. Note that @EdwinAshworth considers a forty year old article to be a more appropriate source than a dictionary, and current usage. Perhaps in the 70s, it was the right interpretation, but now? Language has changed, and quite a bit.
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jimsugAug 18 '14 at 11:03

Thank to both of you for the new inputs(quite some heated debate), and I have done some check up on the phrase with google and found both answers makes sense under different context and authors' intents. And in this case of Rowling's writing, Edwin's certainly makes more sense: Harry asked why they didn't mention Percy, Weasleys thought they better get rid of him for a bit to let things cool off. As this is a question concerning context, it's more fair to pick the answer that fits the context for future readers.
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user49119Aug 18 '14 at 13:30

But I am not a native speaker, so I have to go with my guts when there are two equally sound answers. But of course it's still open for discussion if there's still a even more logical explanations for the phrase here.
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user49119Aug 18 '14 at 13:33

2 Answers
2

This usage of 'well' is not the intensifier usage, as Dwight Bolinger argues in 'Degree Words':

In dealing with degree words and the comparative indeterminacy of
'approval' and 'fulfilment' [though 'well-spoken' obviously carries the approval sense
and 'well-read' obviously carries the intensifier sense , what does eg
'She baked the bread well' mean?], it is well to remember that [words
which cannot be intensified can accept only the 'approval' sense]
[eg:]

It was a well-conceived plan.

The case was well argued. [both mean 'in a good way' not 'thoroughly']

This is equally true when ['well' is used with] forms other than
verbs, though these are less numerous; semantically, they are very
much like verbs:

We are well rid of them....

For 'well rid of', some speakers would use 'well shut of' with 'shut'
used as a verbal ['well shut of' best regarded as colloquial (but
quite common) in the UK].

He is well rid of them uses 'well' as an evaluative pragmatic marker (a comment by the narrator on the value of the fact that 'he is rid of them'). Traditionally, this is a one-word reduction of a comment clause, or a[n evaluative] sentence adverbial. It is paraphrased by 'It is well that he is rid of them' (archaic) or 'It's a good thing that he's rid of them'. The usage is not the intensifier usage of well seen in say 'He is well clear of them'.

The usage is unusual in that evaluative etc pragmatic markers are usually set off by commas to distinguish such usage from the adverbial one:

So in this case, the speaker being the character of Ginny Weasley, you would argue that it is the author portraying the character's evaluation of the fact that they are "shut of him"? I fail to see why it can't both intensify and evaluate "[being] shut of him".
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jimsugAug 18 '14 at 8:09

Can you find an authority saying that that the 'well' used in 'well rid/shut of' is the intensifier usage? I don't usually do this, but I'll mention that I've been familiar with the evaluative sense (and only that) for over 50 years. And Dwight Bolinger was an American linguist and Professor of Romance Languages and Literatures at Harvard – and his argument is that This (words which cannot be intensified can accept only the 'approval' sense) is equally true when 'well' is used with forms other than verbs, and that 'well shut / rid of' is one of these cases. Try asking on ELU. Ask JKR.
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Edwin AshworthAug 18 '14 at 8:31

Well, in my cited definition above, based on the Collins dictionary (built using extensive corpora of the English language - and in this case, British English) states that well can be used as an intensifier, and as competent users of English that we are, we may extrapolate this to various contexts. I didn't realise that we are now required to cite each phrase verbatim, I'll note that for future answers. Additionally, an appeal to authority is a logical fallacy - language is defined by its users, not by stone tablets that fell from the heavens into Dwight Bolinger's arms.
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jimsugAug 18 '14 at 8:37

(1) When Jack and Jill went up the hill, 'well' wasn't used as an intensifier. Not every sense applies in every situation. Though admittedly, this isn't even the same word. (2) Why should I believe that your level of competency is greater than a Professor of Languages? (3) Faced with the weight of the counter-arguments, I'd retract my answer as misleading if I were you.
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Edwin AshworthAug 18 '14 at 8:42

Does he mean they are already "very rid of him" or going to "very rid of him"?
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user49119Jun 15 '14 at 9:56

@user49119 The clause is: We are (well) shut of him. This is a stative passive. It uses to be + past participle (used as an adjective). As such, it refers to a an existing state. It is similar to I am married, which means I am currently married. So: we are already well shut of him.
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δοῦλοςJun 15 '14 at 11:35